Configure systems to mount ext4, LUKS-encrypted and network file systems automatically

Mount ext4 automatically
Open /etc/fstab and enter
/dev/sdb1 /mountpoint ext4 defaults 0 0

Mount LUKS-encrypted automatically
Discussed in
Luks

Mount nfs automatically
Open /etc/fstab and enter
nfsserver:/mount_dir /mountpoint nfs defaults 0 0